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Representative Stress Correlation of Global Scratch Quantities at Scratch Testing: Experimental Verification
KTH, Skolan för teknikvetenskap (SCI), Hållfasthetslära (Inst.), Hållfasthetslära (Avd.).ORCID-id: 0000-0001-6232-8819
2019 (engelsk)Inngår i: Crystals, ISSN 2073-4352, Vol. 9, nr 3, artikkel-id 154Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Evaluation and correlation of global quantities, i.e., normal and tangential hardness, at scratch testing in the context of a representative stress description was investigated. In particular, verification based on experimental results is at issue. It has been shown previously that within the framework of classical von Mises elasto-plasticity and quasi-static conditions, correlation can be achieved by using a combination of stresses at different levels of plastic strains to define representative quantities at scratching, accounting for the difference in mechanical behavior at elasto-plastic and rigid plastic scratching. However, verification from experimental results is required, which has been attempted in this study. Predictions based on previous theoretical results were compared with experimental findings for polymeric materials, as well as for different metals. Good agreement was found between the two sets of results, particularly so for the case of polymers modelled by von Mises elasto-plasticity. Accordingly, these results are of direct practical, accurate, and novel relevance for semi-crystalline polymers where viscoelastic effects are negligible.

sted, utgiver, år, opplag, sider
MDPI , 2019. Vol. 9, nr 3, artikkel-id 154
Emneord [en]
scratch testing, contact behavior of global properties, normal hardness, tangential hardness, polymeric materials, metals
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-251354DOI: 10.3390/cryst9030154ISI: 000464477500003Scopus ID: 2-s2.0-85064600960OAI: oai:DiVA.org:kth-251354DiVA, id: diva2:1316124
Merknad

QC 20190516

Tilgjengelig fra: 2019-05-16 Laget: 2019-05-16 Sist oppdatert: 2019-05-23bibliografisk kontrollert

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Larsson, Per-Lennart

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